Answer
90%, 95% and 99%.
Work Step by Step
The three confidence levels used most often are the 90%, 95% and 99%.
Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition
by Bluman, Allan
Published by
McGraw-Hill Education
ISBN 10:
0078136334
ISBN 13:
978-0-07813-633-7
Chapter 7 - Confidence Intervals and Sample - Chapter Quiz - Page 409: 11
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